cafChildFieldAccessor.h

// ##################################################################################################
//
//    Caffa
//    Copyright (C) 3D-Radar AS
//
//    GNU Lesser General Public License Usage
//    This library is free software; you can redistribute it and/or modify
//    it under the terms of the GNU Lesser General Public License as published by
//    the Free Software Foundation; either version 2.1 of the License, or
//    (at your option) any later version.
//
//    This library is distributed in the hope that it will be useful, but WITHOUT ANY
//    WARRANTY; without even the implied warranty of MERCHANTABILITY or
//    FITNESS FOR A PARTICULAR PURPOSE.
//
//    See the GNU Lesser General Public License at <<http://www.gnu.org/licenses/lgpl-2.1.html>>
//    for more details.
//
#pragma once
 
#include "cafObjectHandle.h"
 
#include <memory>
#include <optional>
 
namespace caffa
{
class FieldHandle;
 
class ChildFieldAccessor
{
public:
    ChildFieldAccessor( FieldHandle* field )
        : m_field( field )
    {
    }
    virtual ~ChildFieldAccessor()                                        = default;
    virtual ObjectHandle::Ptr      object()                              = 0;
    virtual ObjectHandle::ConstPtr object() const                        = 0;
    virtual void                   setObject( ObjectHandle::Ptr object ) = 0;
    virtual void                   clear()                               = 0;
 
    virtual ObjectHandle::Ptr deepCloneObject() const                             = 0;
    virtual void              deepCopyObjectFrom( ObjectHandle::ConstPtr object ) = 0;
 
protected:
    FieldHandle* m_field;
};
 
class ChildFieldDirectStorageAccessor : public ChildFieldAccessor
{
public:
    ChildFieldDirectStorageAccessor( FieldHandle* field );
    ~ChildFieldDirectStorageAccessor() override = default;
    ObjectHandle::Ptr      object() override;
    ObjectHandle::ConstPtr object() const override;
    void                   setObject( ObjectHandle::Ptr object ) override;
    void                   clear() override;
 
    ObjectHandle::Ptr deepCloneObject() const override;
    void              deepCopyObjectFrom( ObjectHandle::ConstPtr object ) override;
 
private:
    ObjectHandle::Ptr m_object;
};
 
} // namespace caffa